Platen-position indicator.



C. GABRIELSON. vPLATEN- POSITIONINDl'QATOFL- APPLICATION man AuG.2. 191s.

L1 @@9737 Patented May 30, 1916.

meinst.

" cARLeAiaRiELsoN, or sYRAcUsn, New YORK, nssieivoa fro i.. c.. sivii'rii e Bites. TYPE- wnirna COMPANY, or sYRAcnsE, NEW

YORI/LA CORPRAT'ION OF NEW YORK.

`Plitt.'TEN-IEOSIT0N INDICATOR.

Application filed. August 2.

ToaZZ -w/w'm t may concern.'

Beit known that I, Cani. GaBRmLsoN, a

'.fcitizen ofthe I United States, and resident Eof Syracuse, county of Onondaga, State of New York, have invented. certain new and useful Improvements in Platen-Position -ln- 1 dicators, of which the following is a speci fication.

The present invention relates to improvements in typewriting'machines aiidparticularly to a plate'n position indicator of the type or, Vcharactershown in an earlier applieatidn filed July ,26, 1913, Serial No. 781,444.

' The presentinventioii is'y intended to ob- .viate some Vobjections noted during practical `experience vwith lthe vconstruction of saidprior application. 'For example, it has been found that if the platen were suddenly I,startedthe two pinions on the pointer re# 'spectivelyfengaging the platen pinion and vstationary rack would slide or move rela- A ftively so that the movements of the platen and pointer would not be absolutely Auniform. This result 'only 'occurs when the lplaten is improperly turned, that is, started very rapidly and at an uncalledl for speed,- but tov render the device absolutely dependable'the construction hereinafter more particularly described has been provided. I

Inthe accompanying drawing, Figure 1 isa planV view of the-right handend of the Vplaten .of an ordinary typewriting machine having an embodiment-of the present invention' applied thereto; Fig. 2 vis a view, sub- I'stantially on the line'i2-2 of Fig..1; Fig.'3 is a sectional view substantially on the line yof Fig. 2; Fig. 1 isa more or less `diagrammatic view of the upper surface of l fthe shaft 2 of which isf-provided with hand wheel 3 by which it" =inay` be turned 1 The platenis as'usual munted in a suit-` thestationary arc-'shaped rack.

Referring to the drawings, 1. designates therotary platen of a typewriting machine,

able carriage, a portion of one end lofwhich only lis illustrated and 'is provided v with the usual line feed ratchet A plate therein'over a stud projecting from the end of the carriage andray thumb nut 10. On its "face toward the hand wheel Sgthe plate 6 6 loosely mounted on. the platen shaft 2 is 1 provided with an ar 'shaped rack 7 and a scale '8.' The' plate-isf adapted to beheld stationary bythe engagement of a slot 9 yisprovided withaseries of socketsill with 'w Specification of Letters Patent.

' which overhangs the' scale 8.

-tionary abutment 17.

191s. semi No. 782,691.

whichris 'adapted to.. engage a suitable pin carried-by an indicator 12, thatis loosely mounted on the shaft 2. yThe sockets 11 shaft 2 on the Iopposite .side of the plate 6 l rat-enten ivi-ay so, iaie.

An armi from the indicator 12 and like said indi-v cator terminatesat its'free end in a lip Rotatably mounted on the -aim la is a pinion l5 which constantly meshes with av pinion 16 keyed to the platen 'shaft so as to rotate therewith.4 r1`he diameter of the pinion 15 is such 'that it also is adapted to mesh with the rack 'i' and when in position to engage4 the rack it will be seenthat the pointer 141e will be caused to turn withA the platen. The aperture in the plate 6 is of such size that the pointer 14 is adapted to Vbe moved tocarry the pinion 15 thereon beyond either end of the rack and when the pinion is in such position thepointer rests upon a sta- Two similar pivotally mounted spring pressed dogs 18, 19, are provided on the plate 6 in position to re spectively engage the pinion 15 when it is beyond opposite ends of the rack '7, as-

shown in Fig. 2. The tooth of either pawl 1S, 19, corresponds to ar tooth of' the arcshaped rack and when the pinion 15 is en- `gaged therewith the pinion is allowed to turn freely in. one direction (the direction.

in which it is turned bythe movement of theplaten which carries the pinion into -engagement with the operative dog).4 If,

however, the direction of movement of the afs asolid tooth 'to force the gear 15 'into :engagement with the rack 7, andcontinued 'movement of the platen will effect movement or filling in addresses, etc. on circular let-A ters.

The manner of using the device may be briefly stated as follows: Assuming that platen is reversed, the. operative dog acts iic the pointer 14 is in the position A, Fig. 4,

the operator will insert abill in themachine be withdrawn iii the regular manner and rotate the platen u ntil the date line is at printing position. The, adjustable indicator 12 vwill then be moved to a corresponding position relative to the Zero mark on the scale 8 less the numbei-,of line spaces which it is desired should .'separate'successivebills. If, for example', the pointer 1l is moved past the zero mar'k to the position indicated at a in Fig. L1. in bringing the date line of the first bill to printing position, and it is desired to leave two spaces between bills, the indicator 1'2 will be adjusted to -al position three spaces from the zero mark in the opposite direction or to the position Z; in Fig. el. If the initial `movement of the platen above referred to does not carry the pointer 11 beyondy Ithe Zero mark but terminates when such pointer is at the' point c, then Ithe indil cator 12 will be adjusted to the position (l. As .the bill is written the .pointer 14 will be carried to'the position indicated in dotted lines 'in Fig. '2

platen will be rotated backward until the pointer 14 is in alinement with the indicator 12y at which time the distance separating` thelas't line on the sales sheet from printing position will be, in the example referred to, two spaces less than the. numberof line spaces necessary to bring the date line of the second bill into printing position.

It will Vbe' seen that when the turning movement of 'the pointer 14 is checked by its contact with the stationary abutment .beyond either end of 'the rack, the pinion 15' 4thereon can turn freely, but immediately upon the direction of rotation of the platen being reversed, .the operative dog or pawl 18, 19, will cause rengagement of said pinion 15 and rack 7. i

Having thus described the invention what is claimed and"desired to be secured by Letters-Patent is,

1. In a typewriting machine, the combination with a rotary platen and'mea-ns for `turning it, of a stationary Tack, an indi' cator adjustable along said rack, an arm or pointer loosely mounted on the platen ing connecting the platen and pinion whereby,` through engagement of the pinion and rack, the pointer will be moved in the same direction and at the-same time as the platen, means for limiting such movement of the pointer beyond the end of the .rack Without reventing further movement of the platen in the same direction, and nieansengaging the pinion at the `with the pointer and permitting it to rotate limit of its said movement and when completed it` will4 v from the machine, without removing the sales sheet, in the ordinary manner.- Before insertinga second bill the mounted on the freely out ofv engagement with the rack and l .recton and at the saine time as the platen,

a stop arranged beyond one end of the rack to limit movement ofthe pointer in that direction, and. a pivotally mounted dog adaptedto engage the pinion when the pointer is bearing upon said stop and acting to re'engage the pinion with the rack when the" direction of rotation of the platen is reversed.

3'. In a typewriting machine, the 'combination with a rotary platen and means for turning it, of a stationary rack, an .indicator adjustable along said rack, -an arm or pointer loosely mounted ou the platen shaft, a pinion rotatably mounted on the'arm and adapted to engage the' rack, gearing con` necting the platen and pinion whereby, through engagement of the pinion and rack, the pointer will turn' in the same direction yand at the same time as the platen, .a Stop arranged to limit movement of the pointer in one direction,n the pinion being out of 'engagen'ient with the rack when the pointer is in contact with said stop. and means for automatically rcngaging the pinion and rack when the direction of movement of thel platen is reversed.y

.4. In, a typewriting machine, the combination with a rotary platen and means for turning it, of a stationary rack, an indicator adjustable along saidA rack, an arm or pointer loosely mounted on the platen shaft, a, pinion rotatably mounted on the 'arm and adapted 4to engage the rack, gearing connecting the platen and pinion. whereby,

through engagement of the pinion and rack, the pointer will turn at the saine time and in the same' direction as the platen, means for limiting movement of the pointer in either directionwiththe pinion out of engagement' with the rack, and means-for automatically rengaging the pinion' and rack when the dilrection of movement ofthe platen' is reversed.

5. In a typewriting machine, the combination with a rotary platen and means forturning it, of a stationary rack, an indica- .tor adjustable along said rack, an arm or pointer loosely mounted on .the platen shaft.

-a pinion rotatably mounted on the. arm and adapted to engage the rack. gearing connecting j the platen and pinion. Whereby,.

through engagement of thepinion and rack, the pointer will turn at the 4same time. and

' inthe' same direction. as the' platen, bmeans platen i's'reversed; g

' 6. ln -a typewriting machine',"t he combination with a "platen and means for 'turning it, of a stationary arc-shaped rack'provided with a scale, the .graduations ofwhich correspond f to line space movement fof the' platen, .an indicator :adjustablealong said scale and ladapted toA be held stationary in any adj usted position, a pinion onthe platen shaft, anl arm or pointer adapted to turn about the `platei-i axis and havingsrotatably mounted-,thereon a pinion adapted toenggage the pinion on the platen shaft and rack, means for holdingthe pointer stationarywhen thel pinion'thereon passes from-eik* gagement with the rack by rotation ofith'e platen in one direction, andmeansforfautomatically rengagi'ng the pinion o n ,the pointer with `therack when the directionof rotation of the platen is reversed. 7. In a typewriting machine, the combi-` nation with 'a rotary lplaten'and means for turning it, of a stationary rack, a relatively stationary indicatory mounted on the platen shaft fandA adjustable along the rack, an arm or pointer loosely .mounted on the platen shaft, a pinion rotatably .mounted on the arm 4and adapted to.' engage the rack, .gearing connecting the. platen and pinion whereby, through engagement of the pinion' l and rack, the pointer willturn at the same time and in the same direction as the platen,

platen is" reversed.

aiid two pivotally.mountedA dogs arranged.

I,to respectively engage thepiniox on the pfointer when said pinion is carrie cally venect rengagernent ofsaid pinion and rack when the directlon of vrotation of the- L/ 8. Inatypewriting machine, the combination with a rotary'plate'n and meansv for turning it, of a stationaryprack, an indicator adjustable .along vsaid rack and adapted tol be held stationary in-any-'adjusted position thereon, a .pinion mounted to rotate with. the platen, a pointer loosely mounted on the platen shaft and having a pinion constantly meshingjwith said platen. pinion and adapt.v

ed to engage the rack, whereby the pointer -will turn' in the same directionand at' the` saine tim'e -as the platen when its pinion is in mesh with the .raclnand means for auto'- matically rengaging therackand pointer pinion when the direction of rotation of the platen l'is reversed after the pointer has beencarried beyond either end-of the rack.-

9. lin a t pewriting machine, ,theacom-l a rotatable platen and means.

bination wit for'turning it, of a rack, an indicator adjustable with respect to the rack, an arm coop- @rating with saidV indicator, means between' the platen and -ra'ck capable of causing said arm to move a limited-distance in the samel direction. as the platen when the latter is land means for interrupting the function of said Ineansbetween 'the platen and rack, .whereby the platen is free to movebeyond .the limit of the movement of said arm.

in presence of two witnesses.

CARL GABRIELSON. Viitnessesv g C. lF. PARSONS, i I W. FOSTER.

beyond 'o'pposite ends of the rack and to automati- 75 turned, ,means capable. of arresting the arm,

'.f/ In testimony whereof I aliix my signatur e`\ 

